Question

AJUTORRRRRRRRRRRR DAU COROANĂ ​

Answer 1

A={x∈ R / - 1 ≤ x ≤ 5}

-1 ≤x ≤5

=> x∈{-1,0,1,2,3,4,5}

=> A={-1,0,1,2,3,4,5}

B={x∈ℤ / |x+4| < 5}

|x+4| < 5

=> - 5 <x+4<5 / - 4

-9<x<1

=> x∈ { - 8,-7,-6,-5,-4,-3,-2,-1,0}

=> B = {-8,-7,-6,-5,-4,-3,-2,-1,0}

A∩B={-1,0}

A∩ℤ = A

SUCCES!